The Saturn Ion is a compact car sold by Saturn between the 2003 and 2007 model years. Based on the GM Delta platform, the Ion replaced the Saturn S-Series in 2002, and was replaced by the new Saturn Astra in 2008. Production of the Ion ended on March 29, 2007. The Ion was the last Saturn passenger car built at the Spring Hill, Tennessee plant which was originally linked to the company's branding, with Saturn owners attending "homecoming" events at the plant.

The Saturn Corporation, also known as Saturn LLC, was an American automobile manufacturer, a registered trademark established on January 7, 1985, as a subsidiary of General Motors. The company was an attempt by GM to compete directly with Japanese imports and transplants, initially in the US compact car market. The company was known for its 'no-haggle' sales technique.